package com.yoyo.web.controller.system;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import com.yoyo.common.core.controller.BaseController;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;

/**
 * @author zyl
 * @Date 2021/7/31 -16:16
 */
@Controller
@RequestMapping("/captcha")
public class SysCaptchaController extends BaseController {
    @Autowired
    @Qualifier("captchaProducer")
    private Producer captchaProducer;

    @Autowired
    @Qualifier("captchaProducerMath")
    private Producer captchaProducerMath;

    @GetMapping("/captchaImage")
    public ModelAndView getKaptchaImage(HttpServletRequest request, HttpServletResponse response) {
        ServletOutputStream out = null;
        try {
            HttpSession session = request.getSession();
            response.setDateHeader("Expires", 0);
            response.setHeader("Cache-Control", "no-store,no-cache,must-revalidate");
            response.addHeader("Cache-Control", "post-check=0,pre-check=0");
            response.setHeader("Pragma", "no-cache");
            response.setContentType("image/jpeg");

            String type = request.getParameter("type");
            String capStr;
            String code="";
            BufferedImage bi=null;
            if ("math".equals(type)) {
                String capText = captchaProducerMath.createText();
                capStr = capText.substring(0, capText.lastIndexOf("@"));
                code = capText.substring(capText.lastIndexOf("@") + 1);
                bi = captchaProducerMath.createImage(capStr);
            } else if ("char".equals(type)) {
                capStr=code =captchaProducer.createText();
                bi =captchaProducer.createImage(capStr);
            }
            session.setAttribute(Constants.KAPTCHA_SESSION_KEY,code);
            out = response.getOutputStream();
            ImageIO.write(bi,"jpg",out);
            out.flush();
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            try {
                if (out!=null){
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

}
